iis 7 url rewrite problem

i am trying to change too change this url
book.asp?SC=ABC5027#offer&rmid=SurvivalGuideE4&rrid=237952859
to move the anchor tag to the end.... like:
book.asp?SC=ABC5027&rmid=SurvivalGuideE4&rrid=237952859#offer

the rule we're trying is seems to test ok, but doesnt work in practice

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